CN1273211A - Control method for preferably segmented precise winding in spinning - Google Patents

Abstract

A control method for preferably segmented precise winding in spinning features that the winding ratio and relative winding parameters are optimally chosen and the closed-loop real-time in-line control of winding procedure is realized by a computer control system. Its advantages include effectively preventing overlap, stable and discrete distribution of yarn turns, compact arrangement of yarn turns, uniform density, high winding volume, and no end breaking and loosening easily on high-speed dewinding.

Description

Control method for preferably segmented precise winding in spinning

Control method for preferably segmented precise winding in spinning relates to textile machine control technology field.

Chemical-fibres filaments is wound into cylindrical package on spinning machine.In the package process, increase along with winding diameter, reel than changing continuously by rectangular hyperbola, when the fraction in lowest term of coiling ratio partly reaches some numerical value, the wire ring of the front and back silk layer in the package can be continuously on same position and the intensive silk ribbon that a kind of helix is protruded occurred, this just overlapping phenomenon occurred inevitably, causes the vibration of winding head, the shaping of damage package, and when the unwinding of road, back broken end and knocking over takes place easily.In order to prevent overlapping generation, multiple operational method for winding is arranged, for example: winding angle coiling methods such as winding angle coiling methods such as Composite Triangular ripple, pulse are anti-stacked, precise winding method and tight precise winding method or the like piecemeal, use the way that changes the traversing number of times and produce anti-stacked effect.But they all exist certain deficiency and defective, and wherein distinct issues are to be careless about the state that lays between the silk layer in the package the most, ignore the positional stability that wire ring distributes.Owing to the unstable wire ring that causes in position is walked about, the anti-stacked effect with the original expection of out of reach makes to be difficult to obtain the high capacity package that is shaped good when high-speed winding; When the road high-speed unwinding of back, then wire ring tangles easily mutually, and knocking over and cause broken end easily is difficult to the unwinding that is well on.

The present invention is a kind of new coiling controlling method that proposes in order to solve deficiency that above-mentioned existing method exists and defective, is intended to prevent effectively overlapping, improves the stability of wire ring between the silk layer, increases the apparent density of package and the conformability of ectonexine thereof.

Preferably segmented precise winding method of the present invention, will be with the increase of winding diameter continually varying reel and change several constant coilings of becoming through optimized choice than bonded assembly broken line than curve, will wait winding angle to reel to optimize to be divided into plurality of sections and to reel than unmodified precise winding.Coiling than the principle of optimized choice is: the wire ring between silk layer and the silk layer lays has good discreteness, the fraction in lowest term that makes the coiling ratio partly is 2/5 or 3/5,2/9 or 7/9 etc., the traversing number of times is taken as 5 and 9 etc. in one of them coiling cycle, like this coiling in the cycle first layer be subjected to thereafter the repeatedly constraint of silk layer that reciprocal wire ring point of transition is evenly distributed discrete, thereby guarantee wire ring position firm stable, can the anterior layer wire ring be walked about because of laying back layer wire ring; Suitably select coiling between the cycle wrapping wire spacing of wire ring make it close, its value obtains the greatest limit width that is slightly larger than the every chemical-fibres filaments that is wound in the package, and inside and outside be consistent, therefore, wire ring during coiling week is arranged closely, and the tightness degree basically identical; The size variation of winding angle is smaller or equal to 1.5 °, makes the winding speed fluctuating quantity little and keep enough constancys, the unlikely criterion of control quality that influences chemical-fibres filaments.According to above-mentioned every technical essential, should make the many commentaries on classics of package in the cycle or turn over an identical arc length less at each coiling, promptly have: $\mathrm{tg\α}=\frac{2H{M}_R}{{\mathrm{\πd}}_k{n}_R\±S/\sin \mathrm{\α}}$ α is that winding angle, H are traversing traverse, M in the formula _RBe traversing number of times, the n in the cycle of reeling _RBe the package turn over number in the cycle of reeling and N _R/ M _R=i _RBe coiling ratio, the d that overlaps _KFor winding diameter, S are adjacent wrapping wire spacing.Then can try to achieve each preferably segmented precise winding and compare i _N(wherein N=0,1,2 ..., n) be: $i_N=i_R\±\frac{{\mathrm{Si}}_R}{2{\mathrm{HM}}_R\mathrm{COS\α}\±S}$ Si in the formula _R/ 2HM _RCOS α ± S=Δ i _RBe when avoiding overlapping front and back reel reel when keeping a wrapping wire spacing between the adjacent wire ring of cycle than in respect to overlapping coiling than for due deviation value, it is difference with the size of overlapping coiling ratio.

The present invention adopts computer control system to realize preferably segmented precise winding.Before winding process begins, can key in winding speed V, wrapping wire interval S, minimum winding angle α by the operating mode of chemical-fibres filaments spinning production scene _L, bobbin blank pipe diameter d ₀, bobbin full packages diameter d _H, touch roll diameter D _T, traversing traverse H, the required guidewire shaft revolution J of traversing, the filar guide transmission shaft is to technological parameter such as the transmitting ratio Q between the traversing motor and mechanism structure parameter and the coefficient of control algorithm in real time, and be kept in the memory of computer control system, in memory, set up each preferably segmented precise winding by computing machine and compare i _NWith winding diameter setting value d corresponding with it _NBetween d _N-i _NThe initial speed n of data form and traversing motor _Mo,, thereby improved the real-time of the control of reeling for the real-time control of winding process provides information; It also can be finished by the upper computer in the chemical-fibres filaments take-up winding computer distributed control system.In winding process control, obtain arbitrary instantaneous actual winding diameter d by computing machine _x, then according to the d that in memory, has set up _N-i _NThe segmented precise winding that data form is found the due optimized choice in corresponding region compares i _N, calculate traversing rotating speed of motor setting value n _MG, according to the traversing motor speed measured value n that picks up by tachogen _m, call real-time control algorithm and obtain output signal, deliver to the speed governing of traversing motor frequency conversion device, thereby realize closed loop online in real time control, as actual winding diameter d the traversing motor _XFrom bobbin blank pipe diameter d ₀Arrive the full tube of bobbin diameter d _HThe time, operational process finishes.

Preferably segmented precise winding method of the present invention and employing computer control system are carried out the control of closed loop online in real time to the coiling overall process, obtain desirable anti-stacked effect, and silk interlayer wire ring lays position stability, coiling is the big and inside and outside unanimity of wire ring density between the cycle, the winding speed fluctuating quantity is little, helps forming the good high capacity package that is shaped, unwinding smoothly again when high-speed unwinding, wire ring can not tangle mutually, can knocking over or broken end yet.

Fig. 1 is an operational flow diagram of the present invention.

Fig. 1 explanation: 1. operation beginning; 2. input parameter; 3. the initial address of form fetches data; 4. calculate; 5. collocation parameter; 6. optimized choice is reeled and is compared; 7. set up data form; 8. differentiate; 9. the next address of form fetches data; 10. calculate; 11. calculate and storage output initial value; First address of form 12. fetch data; The sampling 13. test the speed; 14. calculate; 15. differentiate; 16. differentiate; 17. differentiate; 18. table look-up; The next address of form 19. fetch data; 20. calculate; 21. call real-time control algorithm; 22. output signal is implemented control; 23. get initial output valve; 24. end of run.

Provide embodiments of the invention in conjunction with Fig. 1:

1. operation beginning;

2. press chemical-fibres filaments spinning production scene, with winding speed v, wrapping wire distance s, minimum winding angle α _L, bobbin blank pipe diameter d ₀, bobbin full packages diameter d _H, touch roll diameter D _T, the required guidewire shaft revolution J of traversing traverse H, traversing, filar guide transmission shaft are to inputs such as technological parameters such as the transmitting ratio Q between the traversing motor and mechanical configuration parameter and the real-time control algorithm coefficients of closed loop and be kept among the memory of computer control system.

3. make preferably segmented precise winding than with the d of winding diameter setting value _N-i _NN=0 in the data form;

4. calculate bobbin blank pipe diameter d ₀Pairing coiling ratio;

The collocation and select the cooresponding coiling that overlaps to compare i _RTraversing number of times M with the cycle of reeling _R

6. the preferably segmented precise winding that calculates through optimized choice compares i _N

7. with the winding diameter setting value d that draws _NCompare i with preferably segmented precise winding _NDeposit d in _N-i _NAmong the data form, for the real-time control of winding process provides information;

8. differentiate winding diameter setting value d _NWhether less than bobbin full packages diameter d _H

9. if winding diameter setting value d _NLess than bobbin full packages diameter d _H, then make d _N-i _NN=N+1 in the data form;

10. calculate winding diameter setting value d _N, repeated to change over to the 5th step then;

11. if winding diameter setting value d _NGreater than bobbin full packages diameter d _H, the initial speed n of calculating and storage traversing motor _Mo

12. make d _N-i _NN=1 in the data form;

13. simultaneously to the touch roll rotation speed n _T, the package rotation speed n _K, traversing motor actual speed n _mSample;

14. try to achieve instantaneous actual winding diameter d _X

15. differentiate instantaneous actual winding diameter d _XWhether equal bobbin blank pipe diameter d ₀

16. if d _XBe not equal to d ₀, then further differentiate d _XWhether less than bobbin full packages diameter d _H

17. if d _XLess than d _H, then further differentiate d _XWhether less than winding diameter setting value d _N

18. if d _XLess than d _N, then at d _N-i _NIn the data form by d _N-1Find out cooresponding i _N-1Value;

19. if d _XGreater than d _N, then make d _N-i _NN=N+1 in the data form, and then changed for the 18th step over to, at d _N-i _NIn the data form by d _N-1Find out cooresponding i _N-1Value;

20. calculate traversing motor speed setting value n _MG

21. according to traversing motor speed setting value n _MGWith traversing motor speed measured value n _mDeviation call real-time control algorithm;

Deliver to the traversing motor 22. draw output signal by frequency converter, then, repeated for the 13rd step again, thereby realize traversing non-linear objective function of the present invention;

23. if d _XEqual d ₀, then get the initial speed n of traversing motor _M0As traversing motor speed setting value n _MG, then entered for the 21st step again;

24. if instantaneous actual winding diameter d _XGreater than bobbin full packages diameter d _H, end of run then.

In the above-mentioned operation sheet the 1st step can be finished by the upper computer in the computer distributed control system of computer control system or chemical-fibres filaments spinning machine before winding process begins to the 10th step; The 12nd step then was in winding process control to 24 steps, was carried out by computer control system.

The present invention both can be used for the rotary wind type reciprocating thread guide mechanism of spinning machine, can be used for the cam-type reciprocating thread guide mechanism again; Both can be used for direct winding head, can be used for the winding head of frictional transmission again.The present invention is applicable to the winding mechanism of the cylindrical package of any linear material of reeling.

Claims (4)

1. control method for preferably segmented precise winding in spinning relates to textile machine control technology field, it is characterized in that increasing with winding diameter and continually varying reel to change and become the continuous broken line with constant coiling ratio, by formula i than curve _N=i _R± Si _R/ 2HM _RCOS α ± S is the coiling ratio that lays of optimized choice silk interlayer wire ring one by one, the i in the formula _NFor each preferably segmented precise winding (wherein N=0,1,2 ...), i _RBe the coiling ratio that overlaps, M _RBe the traversing number of times in the cycle of reeling, S is adjacent wrapping wire spacing, and H is the traversing traverse, and α is a winding angle, make during adjacent coiling week wire ring near and inside and outside be consistent, the variation range of winding angle is smaller or equal to 1.5 °;

2. control method according to claim 1 is characterized in that adopting the computer control system of winding process being controlled, realized preferably segmented precise winding in real time,

(1) with winding speed V, wrapping wire interval S, minimum winding angle α _L, bobbin blank pipe diameter d ₀, bobbin full packages diameter d _H, touch roll diameter D _T, the required guidewire shaft revolution J of traversing traverse H, traversing, filar guide transmission shaft to technological parameter such as the transmitting ratio Q between the traversing motor and mechanical configuration parameter and in real time control algorithm the coefficient input and be kept in the memory of computer control system;

(2) before winding process begins, compare i by each preferably segmented precise winding of COMPUTER CALCULATION _NAnd cooresponding winding diameter setting value d _N, the traversing motor initial speed n _Mo, and in memory, set up d _N-i _NData form and storage n _Mo, for the real-time control of implementing winding process provides comparison information;

(3) in winding process control, try to achieve arbitrary instantaneous actual winding diameter d by computing machine _X, then according to the d that in memory, has set up _N-i _NThe segmented precise winding that data form is found the due optimized choice in corresponding region compares i _N, calculate traversing rotating speed of motor setting value n _MG, according to the traversing motor speed n of actual measurement _m, call real-time control algorithm and obtain output signal, deliver to the speed governing of traversing motor frequency conversion device, the traversing motor is implemented the control of closed loop online in real time.

3. control method according to claim 2 is characterized in that: before winding process begins, for the real-time control of implementing winding process provides comparison information to be finished by the upper computer in the up-coiler computer distributed control system.

4. according to claim 1,2 described control methods, it is characterized in that: the rotary wind type traversing or the cam-type reciprocating thread guide mechanism that can be used for spinning machine, the winding head that also can be used for direct drive winding head or frictional transmission is applicable to the winding mechanism of the cylindrical package of any wire member of reeling.

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